Pulled the right rear head off, not good.
[img]http://inlinethumb27.webshots.com/11802/2358332920080251109S200x200Q85.jpg[/img] I'll take the rest off soon.
Does not appear that the heads have ever been off before, and the ridge at the top of the cylinders is very small.
Surprisingly the cylinder walls look decent after scrapping the gunk off, still a small chance it will run without a complete rebuild.
If I could find a set of over sized pistons at a good price I wold be tempted to bore it...
I have uploaded more pictures several times now, so if you looked at them earlier, there are a bunch more now.
Grigg